Mercurial > projects > dwt-linux
annotate dwt/widgets/Label.d @ 259:c0d810de7093
Update SWT 3.4M7 to 3.4
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 29 Jun 2008 14:33:38 +0200 |
| parents | 5a30aa9820f3 |
| children | bfafc891369e |
| rev | line source |
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| 72 | 1 /******************************************************************************* |
| 259 | 2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
| 64 | 3 * All rights reserved. This program and the accompanying materials |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 72 | 10 * Port to the D programming language: |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 64 | 12 *******************************************************************************/ |
| 13 module dwt.widgets.Label; | |
| 14 | |
| 15 | |
| 71 | 16 import dwt.DWT; |
| 64 | 17 import dwt.internal.gtk.OS; |
| 18 import dwt.graphics.Point; | |
| 19 import dwt.graphics.Image; | |
| 20 import dwt.widgets.Control; | |
| 21 import dwt.widgets.Composite; | |
| 22 import dwt.widgets.ImageList; | |
| 23 | |
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24 import dwt.dwthelper.utils; |
| 64 | 25 |
| 26 /** | |
| 27 * Instances of this class represent a non-selectable | |
| 28 * user interface object that displays a string or image. | |
| 29 * When SEPARATOR is specified, displays a single | |
| 30 * vertical or horizontal line. | |
| 259 | 31 * <p> |
| 32 * Shadow styles are hints and may not be honoured | |
| 33 * by the platform. To create a separator label | |
| 34 * with the default shadow style for the platform, | |
| 35 * do not specify a shadow style. | |
| 36 * </p> | |
| 64 | 37 * <dl> |
| 38 * <dt><b>Styles:</b></dt> | |
| 39 * <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd> | |
| 40 * <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> | |
| 41 * <dd>CENTER, LEFT, RIGHT, WRAP</dd> | |
| 42 * <dt><b>Events:</b></dt> | |
| 43 * <dd>(none)</dd> | |
| 44 * </dl> | |
| 45 * <p> | |
| 46 * Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified. | |
| 47 * SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified. | |
| 48 * Only one of CENTER, LEFT and RIGHT may be specified. | |
| 49 * </p><p> | |
| 50 * IMPORTANT: This class is intended to be subclassed <em>only</em> | |
| 71 | 51 * within the DWT implementation. |
| 64 | 52 * </p> |
| 259 | 53 * |
| 54 * @see <a href="http://www.eclipse.org/swt/snippets/#label">Label snippets</a> | |
| 55 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: ControlExample</a> | |
| 56 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> | |
| 64 | 57 */ |
| 58 public class Label : Control { | |
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59 |
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60 alias Control.computeSize computeSize; |
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61 alias Control.mnemonicHit mnemonicHit; |
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62 alias Control.mnemonicMatch mnemonicMatch; |
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63 alias Control.setBackgroundColor setBackgroundColor; |
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64 alias Control.setBounds setBounds; |
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65 alias Control.setForegroundColor setForegroundColor; |
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66 |
| 64 | 67 GtkWidget* frameHandle, labelHandle, imageHandle; |
| 68 ImageList imageList; | |
| 69 Image image; | |
| 238 | 70 String text; |
| 64 | 71 |
| 72 /** | |
| 73 * Constructs a new instance of this class given its parent | |
| 74 * and a style value describing its behavior and appearance. | |
| 75 * <p> | |
| 76 * The style value is either one of the style constants defined in | |
| 71 | 77 * class <code>DWT</code> which is applicable to instances of this |
| 64 | 78 * class, or must be built by <em>bitwise OR</em>'ing together |
| 79 * (that is, using the <code>int</code> "|" operator) two or more | |
| 71 | 80 * of those <code>DWT</code> style constants. The class description |
| 64 | 81 * lists the style constants that are applicable to the class. |
| 82 * Style bits are also inherited from superclasses. | |
| 83 * </p> | |
| 84 * | |
| 85 * @param parent a composite control which will be the parent of the new instance (cannot be null) | |
| 86 * @param style the style of control to construct | |
| 87 * | |
| 88 * @exception IllegalArgumentException <ul> | |
| 89 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
| 90 * </ul> | |
| 71 | 91 * @exception DWTException <ul> |
| 64 | 92 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| 93 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
| 94 * </ul> | |
| 95 * | |
| 71 | 96 * @see DWT#SEPARATOR |
| 97 * @see DWT#HORIZONTAL | |
| 98 * @see DWT#VERTICAL | |
| 99 * @see DWT#SHADOW_IN | |
| 100 * @see DWT#SHADOW_OUT | |
| 101 * @see DWT#SHADOW_NONE | |
| 102 * @see DWT#CENTER | |
| 103 * @see DWT#LEFT | |
| 104 * @see DWT#RIGHT | |
| 105 * @see DWT#WRAP | |
| 64 | 106 * @see Widget#checkSubclass |
| 107 * @see Widget#getStyle | |
| 108 */ | |
| 109 public this (Composite parent, int style) { | |
| 110 super (parent, checkStyle (style)); | |
| 111 } | |
| 112 | |
| 113 static int checkStyle (int style) { | |
| 71 | 114 style |= DWT.NO_FOCUS; |
| 115 if ((style & DWT.SEPARATOR) !is 0) { | |
| 116 style = checkBits (style, DWT.VERTICAL, DWT.HORIZONTAL, 0, 0, 0, 0); | |
| 117 return checkBits (style, DWT.SHADOW_OUT, DWT.SHADOW_IN, DWT.SHADOW_NONE, 0, 0, 0); | |
| 64 | 118 } |
| 71 | 119 return checkBits (style, DWT.LEFT, DWT.CENTER, DWT.RIGHT, 0, 0, 0); |
| 64 | 120 } |
| 121 | |
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122 override void addRelation (Control control) { |
| 64 | 123 if (!control.isDescribedByLabel ()) return; |
| 124 if (labelHandle is null) return; | |
| 125 auto accessible = OS.gtk_widget_get_accessible (labelHandle); | |
| 126 auto controlAccessible = OS.gtk_widget_get_accessible (control.handle); | |
| 127 if (accessible !is null && controlAccessible !is null) { | |
| 128 OS.atk_object_add_relationship (controlAccessible, OS.ATK_RELATION_LABELLED_BY, accessible); | |
| 129 } | |
| 130 } | |
| 131 | |
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132 public override Point computeSize (int wHint, int hHint, bool changed) { |
| 64 | 133 checkWidget (); |
| 71 | 134 if (wHint !is DWT.DEFAULT && wHint < 0) wHint = 0; |
| 135 if (hHint !is DWT.DEFAULT && hHint < 0) hHint = 0; | |
| 136 if ((style & DWT.SEPARATOR) !is 0) { | |
| 137 if ((style & DWT.HORIZONTAL) !is 0) { | |
| 138 if (wHint is DWT.DEFAULT) wHint = DEFAULT_WIDTH; | |
| 64 | 139 } else { |
| 71 | 140 if (hHint is DWT.DEFAULT) hHint = DEFAULT_HEIGHT; |
| 64 | 141 } |
| 142 } | |
| 71 | 143 bool fixWrap = labelHandle !is null && (style & DWT.WRAP) !is 0; |
| 64 | 144 if (fixWrap || frameHandle !is null) forceResize (); |
| 145 int labelWidth, labelHeight; | |
| 146 if (fixWrap) { | |
| 147 OS.gtk_widget_get_size_request (labelHandle, &labelWidth, &labelHeight); | |
| 148 OS.gtk_widget_set_size_request (labelHandle, wHint, hHint); | |
| 149 } | |
| 150 Point size; | |
| 151 if (frameHandle !is null) { | |
| 152 int reqWidth, reqHeight; | |
| 153 OS.gtk_widget_get_size_request (handle, &reqWidth, &reqHeight); | |
| 154 OS.gtk_widget_set_size_request (handle, wHint, hHint); | |
| 155 size = computeNativeSize (frameHandle, -1, -1, changed); | |
| 156 OS.gtk_widget_set_size_request (handle, reqWidth, reqHeight); | |
| 157 } else { | |
| 158 size = computeNativeSize (handle, wHint, hHint, changed); | |
| 159 } | |
| 160 if (fixWrap) { | |
| 161 OS.gtk_widget_set_size_request (labelHandle, labelWidth, labelHeight); | |
| 162 } | |
| 163 /* | |
| 164 * Feature in GTK. Instead of using the font height to determine | |
| 165 * the preferred height of the widget, GTK uses the text metrics. | |
| 166 * The fix is to ensure that the preferred height is at least as | |
| 167 * tall as the font height. | |
| 168 * | |
| 169 * NOTE: This work around does not fix the case when there are | |
| 170 * muliple lines of text. | |
| 171 */ | |
| 71 | 172 if (hHint is DWT.DEFAULT && labelHandle !is null) { |
| 64 | 173 auto layout = OS.gtk_label_get_layout (cast(GtkLabel*)labelHandle); |
| 174 auto context = OS.pango_layout_get_context (layout); | |
| 175 auto lang = OS.pango_context_get_language (context); | |
| 176 auto font = getFontDescription (); | |
| 177 auto metrics = OS.pango_context_get_metrics (context, font, lang); | |
| 178 int ascent = OS.PANGO_PIXELS (OS.pango_font_metrics_get_ascent (metrics)); | |
| 179 int descent = OS.PANGO_PIXELS (OS.pango_font_metrics_get_descent (metrics)); | |
| 180 OS.pango_font_metrics_unref (metrics); | |
| 181 int fontHeight = ascent + descent; | |
| 182 int buffer; | |
| 183 OS.g_object_get1 (labelHandle, OS.ypad.ptr, &buffer); | |
| 184 fontHeight += 2 * buffer; | |
| 185 if (frameHandle !is null) { | |
| 186 auto style = OS.gtk_widget_get_style (frameHandle); | |
| 187 fontHeight += 2 * OS.gtk_style_get_ythickness (style); | |
| 188 fontHeight += 2 * OS.gtk_container_get_border_width (cast(GtkContainer*)frameHandle); | |
| 189 } | |
| 190 size.y = Math.max (size.y, fontHeight); | |
| 191 } | |
| 192 return size; | |
| 193 } | |
| 194 | |
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195 override void createHandle (int index) { |
| 64 | 196 state |= HANDLE | THEME_BACKGROUND; |
| 197 fixedHandle = cast(GtkWidget*)OS.g_object_new (display.gtk_fixed_get_type (), null); | |
| 71 | 198 if (fixedHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 199 OS.gtk_fixed_set_has_window (cast(GtkFixed*)fixedHandle, true); |
| 71 | 200 if ((style & DWT.SEPARATOR) !is 0) { |
| 201 if ((style & DWT.HORIZONTAL)!is 0) { | |
| 64 | 202 handle = OS.gtk_hseparator_new (); |
| 203 } else { | |
| 204 handle = OS.gtk_vseparator_new (); | |
| 205 } | |
| 71 | 206 if (handle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 207 } else { |
| 208 handle = OS.gtk_hbox_new (false, 0); | |
| 71 | 209 if (handle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 210 labelHandle = OS.gtk_label_new_with_mnemonic (null); |
| 71 | 211 if (labelHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 212 imageHandle = OS.gtk_image_new (); |
| 71 | 213 if (imageHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 214 OS.gtk_container_add (cast(GtkContainer*)handle, labelHandle); |
| 215 OS.gtk_container_add (cast(GtkContainer*)handle, imageHandle); | |
| 216 } | |
| 71 | 217 if ((style & DWT.BORDER) !is 0) { |
| 64 | 218 frameHandle = OS.gtk_frame_new (null); |
| 71 | 219 if (frameHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 220 OS.gtk_container_add (cast(GtkContainer*)fixedHandle, frameHandle); |
| 221 OS.gtk_container_add (cast(GtkContainer*)frameHandle, handle); | |
| 222 OS.gtk_frame_set_shadow_type (cast(GtkFrame*)frameHandle, OS.GTK_SHADOW_ETCHED_IN); | |
| 223 } else { | |
| 224 OS.gtk_container_add (cast(GtkContainer*)fixedHandle, handle); | |
| 225 } | |
| 71 | 226 if ((style & DWT.SEPARATOR) !is 0) return; |
| 240 | 227 if ((style & DWT.WRAP) !is 0) { |
| 228 OS.gtk_label_set_line_wrap (labelHandle, true); | |
| 229 if (OS.GTK_VERSION >= OS.buildVERSION (2, 10, 0)) { | |
| 230 OS.gtk_label_set_line_wrap_mode (labelHandle, OS.PANGO_WRAP_WORD_CHAR); | |
| 231 } | |
| 232 } | |
| 259 | 233 setAlignment (); |
| 64 | 234 } |
| 235 | |
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236 override void createWidget (int index) { |
| 64 | 237 super.createWidget (index); |
| 238 text = ""; | |
| 239 } | |
| 240 | |
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241 override void deregister () { |
| 64 | 242 super.deregister (); |
| 243 if (frameHandle !is null) display.removeWidget (frameHandle); | |
| 244 if (labelHandle !is null) display.removeWidget (labelHandle); | |
| 245 if (imageHandle !is null) display.removeWidget (imageHandle); | |
| 246 } | |
| 247 | |
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248 override GtkWidget* eventHandle () { |
| 64 | 249 return fixedHandle; |
| 250 } | |
| 251 | |
| 252 /** | |
| 253 * Returns a value which describes the position of the | |
| 254 * text or image in the receiver. The value will be one of | |
| 255 * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code> | |
| 256 * unless the receiver is a <code>SEPARATOR</code> label, in | |
| 257 * which case, <code>NONE</code> is returned. | |
| 258 * | |
| 259 * @return the alignment | |
| 260 * | |
| 71 | 261 * @exception DWTException <ul> |
| 64 | 262 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 263 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 264 * </ul> | |
| 265 */ | |
| 266 public int getAlignment () { | |
| 267 checkWidget (); | |
| 71 | 268 if ((style & DWT.SEPARATOR) !is 0) return 0; |
| 269 if ((style & DWT.LEFT) !is 0) return DWT.LEFT; | |
| 270 if ((style & DWT.CENTER) !is 0) return DWT.CENTER; | |
| 271 if ((style & DWT.RIGHT) !is 0) return DWT.RIGHT; | |
| 272 return DWT.LEFT; | |
| 64 | 273 } |
| 274 | |
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275 public override int getBorderWidth () { |
| 64 | 276 checkWidget(); |
| 277 if (frameHandle !is null) { | |
| 278 return OS.gtk_style_get_xthickness (OS.gtk_widget_get_style (frameHandle)); | |
| 279 } | |
| 280 return 0; | |
| 281 } | |
| 282 | |
| 283 /** | |
| 284 * Returns the receiver's image if it has one, or null | |
| 285 * if it does not. | |
| 286 * | |
| 287 * @return the receiver's image | |
| 288 * | |
| 71 | 289 * @exception DWTException <ul> |
| 64 | 290 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 291 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 292 * </ul> | |
| 293 */ | |
| 294 public Image getImage () { | |
| 295 checkWidget (); | |
| 296 return image; | |
| 297 } | |
| 298 | |
| 238 | 299 override String getNameText () { |
| 64 | 300 return getText (); |
| 301 } | |
| 302 | |
| 303 /** | |
| 304 * Returns the receiver's text, which will be an empty | |
| 305 * string if it has never been set or if the receiver is | |
| 306 * a <code>SEPARATOR</code> label. | |
| 307 * | |
| 308 * @return the receiver's text | |
| 309 * | |
| 71 | 310 * @exception DWTException <ul> |
| 64 | 311 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 312 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 313 * </ul> | |
| 314 */ | |
| 238 | 315 public String getText () { |
| 64 | 316 checkWidget (); |
| 71 | 317 if ((style & DWT.SEPARATOR) !is 0) return ""; |
| 64 | 318 return text; |
| 319 } | |
| 320 | |
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321 override void hookEvents () { |
| 64 | 322 super.hookEvents(); |
| 323 if (labelHandle !is null) { | |
| 324 OS.g_signal_connect_closure_by_id (labelHandle, display.signalIds [MNEMONIC_ACTIVATE], 0, display.closures [MNEMONIC_ACTIVATE], false); | |
| 325 } | |
| 326 } | |
| 327 | |
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328 override bool isDescribedByLabel () { |
| 64 | 329 return false; |
| 330 } | |
| 331 | |
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332 override bool mnemonicHit (wchar key) { |
| 64 | 333 if (labelHandle is null) return false; |
| 334 bool result = super.mnemonicHit (labelHandle, key); | |
| 335 if (result) { | |
| 336 Composite control = this.parent; | |
| 337 while (control !is null) { | |
| 338 Control [] children = control._getChildren (); | |
| 339 int index = 0; | |
| 340 while (index < children.length) { | |
| 341 if (children [index] is this) break; | |
| 342 index++; | |
| 343 } | |
| 344 index++; | |
| 345 if (index < children.length) { | |
| 346 if (children [index].setFocus ()) return result; | |
| 347 } | |
| 348 control = control.parent; | |
| 349 } | |
| 350 } | |
| 351 return result; | |
| 352 } | |
| 353 | |
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354 override bool mnemonicMatch (wchar key) { |
| 64 | 355 if (labelHandle is null) return false; |
| 356 return mnemonicMatch (labelHandle, key); | |
| 357 } | |
| 358 | |
| 359 override void register () { | |
| 360 super.register (); | |
| 361 if (frameHandle !is null) display.addWidget (frameHandle, this); | |
| 362 if (labelHandle !is null) display.addWidget (labelHandle, this); | |
| 363 if (imageHandle !is null) display.addWidget (imageHandle, this); | |
| 364 } | |
| 365 | |
| 366 override void releaseHandle () { | |
| 367 super.releaseHandle (); | |
| 368 frameHandle = imageHandle = labelHandle = null; | |
| 369 } | |
| 370 | |
| 371 override void releaseWidget () { | |
| 372 super.releaseWidget (); | |
| 373 if (imageList !is null) imageList.dispose (); | |
| 374 imageList = null; | |
| 375 image = null; | |
| 376 text = null; | |
| 377 } | |
| 378 | |
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379 override void resizeHandle (int width, int height) { |
| 64 | 380 OS.gtk_widget_set_size_request (fixedHandle, width, height); |
| 381 OS.gtk_widget_set_size_request (frameHandle !is null ? frameHandle : handle, width, height); | |
| 382 } | |
| 383 | |
| 384 /** | |
| 385 * Controls how text and images will be displayed in the receiver. | |
| 386 * The argument should be one of <code>LEFT</code>, <code>RIGHT</code> | |
| 387 * or <code>CENTER</code>. If the receiver is a <code>SEPARATOR</code> | |
| 388 * label, the argument is ignored and the alignment is not changed. | |
| 389 * | |
| 390 * @param alignment the new alignment | |
| 391 * | |
| 71 | 392 * @exception DWTException <ul> |
| 64 | 393 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 394 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 395 * </ul> | |
| 396 */ | |
| 397 public void setAlignment (int alignment) { | |
| 398 checkWidget (); | |
| 71 | 399 if ((style & DWT.SEPARATOR) !is 0) return; |
| 400 if ((alignment & (DWT.LEFT | DWT.RIGHT | DWT.CENTER)) is 0) return; | |
| 401 style &= ~(DWT.LEFT | DWT.RIGHT | DWT.CENTER); | |
| 402 style |= alignment & (DWT.LEFT | DWT.RIGHT | DWT.CENTER); | |
| 259 | 403 setAlignment (); |
| 404 } | |
| 405 | |
| 406 void setAlignment () { | |
| 71 | 407 bool isRTL = (style & DWT.RIGHT_TO_LEFT) !is 0; |
| 259 | 408 if (text !is null && text.length () !is 0) { |
| 409 if (OS.GTK_VERSION >= OS.VERSION(2, 4, 0)) { | |
| 410 auto layout = OS.gtk_label_get_layout (labelHandle); | |
| 411 auto linePtr = OS.pango_layout_get_line (layout, 0); | |
| 412 int resolved_dir = OS.pango_layout_line_get_resolved_dir (linePtr); | |
| 413 if (resolved_dir is OS.PANGO_DIRECTION_RTL) { | |
| 414 isRTL = !isRTL; | |
| 415 } | |
| 416 } | |
| 417 } | |
| 71 | 418 if ((style & DWT.LEFT) !is 0) { |
| 64 | 419 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 0.0f, 0.0f); |
| 420 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, isRTL ? OS.GTK_JUSTIFY_RIGHT : OS.GTK_JUSTIFY_LEFT); | |
| 421 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 0.0f, 0.5f); | |
| 422 return; | |
| 423 } | |
| 71 | 424 if ((style & DWT.CENTER) !is 0) { |
| 64 | 425 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 0.5f, 0.0f); |
| 426 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, OS.GTK_JUSTIFY_CENTER); | |
| 427 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 0.5f, 0.5f); | |
| 428 return; | |
| 429 } | |
| 71 | 430 if ((style & DWT.RIGHT) !is 0) { |
| 64 | 431 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 1.0f, 0.0f); |
| 432 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, isRTL ? OS.GTK_JUSTIFY_LEFT : OS.GTK_JUSTIFY_RIGHT); | |
| 433 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 1.0f, 0.5f); | |
| 434 return; | |
| 435 } | |
| 436 } | |
| 437 | |
| 438 override void setBackgroundColor (GdkColor* color) { | |
| 439 super.setBackgroundColor (color); | |
| 440 setBackgroundColor(fixedHandle, color); | |
| 441 if (labelHandle !is null) setBackgroundColor(labelHandle, color); | |
| 442 if (imageHandle !is null) setBackgroundColor(imageHandle, color); | |
| 443 } | |
| 444 | |
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445 override int setBounds (int x, int y, int width, int height, bool move, bool resize) { |
| 64 | 446 /* |
| 447 * Bug in GTK. For some reason, when the label is | |
| 448 * wrappable and its container is resized, it does not | |
| 449 * cause the label to be wrapped. The fix is to | |
| 450 * determine the size that will wrap the label | |
| 451 * and expilictly set that size to force the label | |
| 452 * to wrap. | |
| 453 * | |
| 454 * This part of the fix causes the label to be | |
| 455 * resized to the preferred size but it still | |
| 456 * won't draw properly. | |
| 457 */ | |
| 71 | 458 bool fixWrap = resize && labelHandle !is null && (style & DWT.WRAP) !is 0; |
| 64 | 459 if (fixWrap) OS.gtk_widget_set_size_request (labelHandle, -1, -1); |
| 460 int result = super.setBounds (x, y, width, height, move, resize); | |
| 461 /* | |
| 462 * Bug in GTK. For some reason, when the label is | |
| 463 * wrappable and its container is resized, it does not | |
| 464 * cause the label to be wrapped. The fix is to | |
| 465 * determine the size that will wrap the label | |
| 466 * and expilictly set that size to force the label | |
| 467 * to wrap. | |
| 468 * | |
| 469 * This part of the fix forces the label to be | |
| 470 * resized so that it will draw wrapped. | |
| 471 */ | |
| 472 if (fixWrap) { | |
| 473 int labelWidth = OS.GTK_WIDGET_WIDTH (handle); | |
| 474 int labelHeight = OS.GTK_WIDGET_HEIGHT (handle); | |
| 475 OS.gtk_widget_set_size_request (labelHandle, labelWidth, labelHeight); | |
| 476 /* | |
| 477 * Bug in GTK. Setting the size request should invalidate the label's | |
| 478 * layout, but it does not. The fix is to resize the label directly. | |
| 479 */ | |
| 480 GtkRequisition requisition; | |
| 481 OS.gtk_widget_size_request (labelHandle, &requisition); | |
| 482 GtkAllocation allocation; | |
| 483 allocation.x = OS.GTK_WIDGET_X (labelHandle); | |
| 484 allocation.y = OS.GTK_WIDGET_Y (labelHandle); | |
| 485 allocation.width = labelWidth; | |
| 486 allocation.height = labelHeight; | |
| 487 OS.gtk_widget_size_allocate (labelHandle, &allocation); | |
| 488 } | |
| 489 return result; | |
| 490 } | |
| 491 | |
| 492 override void setFontDescription (PangoFontDescription* font) { | |
| 493 super.setFontDescription (font); | |
| 494 if (labelHandle !is null) OS.gtk_widget_modify_font (labelHandle, font); | |
| 495 if (imageHandle !is null) OS.gtk_widget_modify_font (imageHandle, font); | |
| 496 } | |
| 497 | |
| 498 override void setForegroundColor (GdkColor* color) { | |
| 499 super.setForegroundColor (color); | |
| 500 setForegroundColor (fixedHandle, color); | |
| 501 if (labelHandle !is null) setForegroundColor (labelHandle, color); | |
| 502 if (imageHandle !is null) setForegroundColor (imageHandle, color); | |
| 503 } | |
| 504 | |
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505 override void setOrientation () { |
| 64 | 506 super.setOrientation (); |
| 71 | 507 if ((style & DWT.RIGHT_TO_LEFT) !is 0) { |
| 64 | 508 if (labelHandle !is null) OS.gtk_widget_set_direction (labelHandle, OS.GTK_TEXT_DIR_RTL); |
| 509 if (imageHandle !is null) OS.gtk_widget_set_direction (imageHandle, OS.GTK_TEXT_DIR_RTL); | |
| 510 } | |
| 511 } | |
| 512 | |
| 513 /** | |
| 514 * Sets the receiver's image to the argument, which may be | |
| 515 * null indicating that no image should be displayed. | |
| 516 * | |
| 517 * @param image the image to display on the receiver (may be null) | |
| 518 * | |
| 519 * @exception IllegalArgumentException <ul> | |
| 520 * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> | |
| 521 * </ul> | |
| 71 | 522 * @exception DWTException <ul> |
| 64 | 523 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 524 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 525 * </ul> | |
| 526 */ | |
| 527 public void setImage (Image image) { | |
| 528 checkWidget (); | |
| 71 | 529 if ((style & DWT.SEPARATOR) !is 0) return; |
| 64 | 530 this.image = image; |
| 531 if (imageList !is null) imageList.dispose (); | |
| 532 imageList = null; | |
| 533 if (image !is null) { | |
| 534 imageList = new ImageList (); | |
| 535 int imageIndex = imageList.add (image); | |
| 536 auto pixbuf = imageList.getPixbuf (imageIndex); | |
| 537 OS.gtk_image_set_from_pixbuf (cast(GtkImage*)imageHandle, pixbuf); | |
| 538 OS.gtk_widget_hide (labelHandle); | |
| 539 OS.gtk_widget_show (imageHandle); | |
| 540 } else { | |
| 541 OS.gtk_image_set_from_pixbuf (cast(GtkImage*)imageHandle, null); | |
| 542 OS.gtk_widget_show (labelHandle); | |
| 543 OS.gtk_widget_hide (imageHandle); | |
| 544 } | |
| 545 } | |
| 546 | |
| 547 /** | |
| 548 * Sets the receiver's text. | |
| 549 * <p> | |
| 550 * This method sets the widget label. The label may include | |
| 551 * the mnemonic character and line delimiters. | |
| 552 * </p> | |
| 553 * <p> | |
| 554 * Mnemonics are indicated by an '&' that causes the next | |
| 555 * character to be the mnemonic. When the user presses a | |
| 556 * key sequence that matches the mnemonic, focus is assigned | |
| 557 * to the control that follows the label. On most platforms, | |
| 558 * the mnemonic appears underlined but may be emphasised in a | |
| 559 * platform specific manner. The mnemonic indicator character | |
| 560 * '&' can be escaped by doubling it in the string, causing | |
| 561 * a single '&' to be displayed. | |
| 562 * </p> | |
| 563 * | |
| 564 * @param string the new text | |
| 565 * | |
| 71 | 566 * @exception DWTException <ul> |
| 64 | 567 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 568 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 569 * </ul> | |
| 570 */ | |
| 238 | 571 public void setText (String string) { |
| 64 | 572 checkWidget (); |
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573 // DWT extension: allow null for zero length string |
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574 //if (string is null) error (DWT.ERROR_NULL_ARGUMENT); |
| 71 | 575 if ((style & DWT.SEPARATOR) !is 0) return; |
| 64 | 576 text = string; |
| 577 char [] chars = fixMnemonic (string); | |
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578 OS.gtk_label_set_text_with_mnemonic (cast(GtkLabel*)labelHandle, chars.toStringzValidPtr()); |
| 64 | 579 OS.gtk_widget_hide (imageHandle); |
| 580 OS.gtk_widget_show (labelHandle); | |
| 259 | 581 setAlignment (); |
| 64 | 582 } |
| 583 | |
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584 override void showWidget () { |
| 64 | 585 super.showWidget (); |
| 586 if (frameHandle !is null) OS.gtk_widget_show (frameHandle); | |
| 587 if (labelHandle !is null) OS.gtk_widget_show (labelHandle); | |
| 588 } | |
| 589 } |